A Jamaican 1919-1921 pictorial variety invert stamp in orange is to lead the sale of the Vestey Collection at Spink London.
The lot carries an estimate of £30,000-50,000 ($45,679-76,132) ahead of the auction, which will showcase rare British empire stamps from across the Caribbean.
The Jamaican invert was discovered in 1922
Spink explains: "What makes this particular item so special is that according to most accounts, this frame inverted variety was discovered by a local collector at the small Post Office in Manchioneal (a village on the north coast) in March 1922.
"It is presumed that only one sheet of sixty must have been printed, with half the sheet going to Manchioneal and some being fiscally used, while, more than likely, the other half sheet went to Kingston, as a used example of the error exists with a Kingston cancellation.
"Estimates vary among specialists as to the exact numbers of these errors that still exist, but the number is believed to be between 10 and 20."
A Trinidadian "Lady McLeod" 5c blue stamp is also on offer at the September 24 sale, with a valuation of £18,000-20,000 ($27,407-30,452).
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